BH is Rakata for the most part cept for a FEW pieces in which the stats are minimally better
if you rip out mods from BH pieces and stick them in rakata your gear is significantly better, just requires you knowing what mods/enhancements you need.
In reference to the OP,you can't get full rakata from doing EV HM. EV and KP each drop half the rakata set, meaning you need to do both to get the full set. It seems Nightmare EC and TFB will do the same when released.